782 lines
24 KiB
C
782 lines
24 KiB
C
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/**
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******************************************************************************
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* @file usbd_audio.c
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* @author MCD Application Team
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* @version V2.0.0
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* @date 18-February-2014
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* @brief This file provides the HID core functions.
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*
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* @verbatim
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*
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* ===================================================================
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* AUDIO Class Description
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* ===================================================================
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*
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*
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*
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*
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*
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*
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* @note In HS mode and when the DMA is used, all variables and data structures
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* dealing with the DMA during the transaction process should be 32-bit aligned.
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*
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*
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* @endverbatim
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*
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******************************************************************************
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* @attention
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*
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* <h2><center>© COPYRIGHT 2014 STMicroelectronics</center></h2>
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*
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* Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
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* You may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.st.com/software_license_agreement_liberty_v2
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "usbd_audio.h"
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#include "usbd_desc.h"
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#include "usbd_ctlreq.h"
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/** @addtogroup STM32_USB_OTG_DEVICE_LIBRARY
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* @{
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*/
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/** @defgroup USBD_AUDIO
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* @brief usbd core module
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* @{
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*/
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/** @defgroup USBD_AUDIO_Private_TypesDefinitions
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* @{
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*/
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/**
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* @}
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*/
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/** @defgroup USBD_AUDIO_Private_Defines
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* @{
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*/
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/**
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* @}
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*/
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/** @defgroup USBD_AUDIO_Private_Macros
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* @{
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*/
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#define AUDIO_SAMPLE_FREQ(frq) (uint8_t)(frq), (uint8_t)((frq >> 8)), (uint8_t)((frq >> 16))
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#define AUDIO_PACKET_SZE(frq) (uint8_t)(((frq * 2 * 2)/1000) & 0xFF), \
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(uint8_t)((((frq * 2 * 2)/1000) >> 8) & 0xFF)
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/**
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* @}
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*/
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/** @defgroup USBD_AUDIO_Private_FunctionPrototypes
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* @{
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*/
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static uint8_t USBD_AUDIO_Init (USBD_HandleTypeDef *pdev,
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uint8_t cfgidx);
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static uint8_t USBD_AUDIO_DeInit (USBD_HandleTypeDef *pdev,
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uint8_t cfgidx);
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static uint8_t USBD_AUDIO_Setup (USBD_HandleTypeDef *pdev,
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USBD_SetupReqTypedef *req);
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static uint8_t *USBD_AUDIO_GetCfgDesc (uint16_t *length);
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static uint8_t *USBD_AUDIO_GetDeviceQualifierDesc (uint16_t *length);
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static uint8_t USBD_AUDIO_DataIn (USBD_HandleTypeDef *pdev, uint8_t epnum);
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static uint8_t USBD_AUDIO_DataOut (USBD_HandleTypeDef *pdev, uint8_t epnum);
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static uint8_t USBD_AUDIO_EP0_RxReady (USBD_HandleTypeDef *pdev);
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static uint8_t USBD_AUDIO_EP0_TxReady (USBD_HandleTypeDef *pdev);
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static uint8_t USBD_AUDIO_SOF (USBD_HandleTypeDef *pdev);
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static uint8_t USBD_AUDIO_IsoINIncomplete (USBD_HandleTypeDef *pdev, uint8_t epnum);
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static uint8_t USBD_AUDIO_IsoOutIncomplete (USBD_HandleTypeDef *pdev, uint8_t epnum);
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static void AUDIO_REQ_GetCurrent(USBD_HandleTypeDef *pdev, USBD_SetupReqTypedef *req);
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static void AUDIO_REQ_SetCurrent(USBD_HandleTypeDef *pdev, USBD_SetupReqTypedef *req);
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/**
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* @}
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*/
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/** @defgroup USBD_AUDIO_Private_Variables
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* @{
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*/
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USBD_ClassTypeDef USBD_AUDIO =
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{
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USBD_AUDIO_Init,
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USBD_AUDIO_DeInit,
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USBD_AUDIO_Setup,
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USBD_AUDIO_EP0_TxReady,
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USBD_AUDIO_EP0_RxReady,
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USBD_AUDIO_DataIn,
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USBD_AUDIO_DataOut,
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USBD_AUDIO_SOF,
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USBD_AUDIO_IsoINIncomplete,
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USBD_AUDIO_IsoOutIncomplete,
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USBD_AUDIO_GetCfgDesc,
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USBD_AUDIO_GetCfgDesc,
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USBD_AUDIO_GetCfgDesc,
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USBD_AUDIO_GetDeviceQualifierDesc,
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};
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/* USB AUDIO device Configuration Descriptor */
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__ALIGN_BEGIN static uint8_t USBD_AUDIO_CfgDesc[USB_AUDIO_CONFIG_DESC_SIZ] __ALIGN_END =
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{
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/* Configuration 1 */
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0x09, /* bLength */
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USB_DESC_TYPE_CONFIGURATION, /* bDescriptorType */
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LOBYTE(USB_AUDIO_CONFIG_DESC_SIZ), /* wTotalLength 109 bytes*/
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HIBYTE(USB_AUDIO_CONFIG_DESC_SIZ),
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0x02, /* bNumInterfaces */
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0x01, /* bConfigurationValue */
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0x00, /* iConfiguration */
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0xC0, /* bmAttributes BUS Powred*/
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0x32, /* bMaxPower = 100 mA*/
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/* 09 byte*/
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/* USB Speaker Standard interface descriptor */
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AUDIO_INTERFACE_DESC_SIZE, /* bLength */
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USB_DESC_TYPE_INTERFACE, /* bDescriptorType */
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0x00, /* bInterfaceNumber */
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0x00, /* bAlternateSetting */
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0x00, /* bNumEndpoints */
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USB_DEVICE_CLASS_AUDIO, /* bInterfaceClass */
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AUDIO_SUBCLASS_AUDIOCONTROL, /* bInterfaceSubClass */
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AUDIO_PROTOCOL_UNDEFINED, /* bInterfaceProtocol */
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0x00, /* iInterface */
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/* 09 byte*/
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/* USB Speaker Class-specific AC Interface Descriptor */
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AUDIO_INTERFACE_DESC_SIZE, /* bLength */
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AUDIO_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType */
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AUDIO_CONTROL_HEADER, /* bDescriptorSubtype */
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0x00, /* 1.00 */ /* bcdADC */
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0x01,
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0x27, /* wTotalLength = 39*/
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0x00,
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0x01, /* bInCollection */
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0x01, /* baInterfaceNr */
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/* 09 byte*/
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/* USB Speaker Input Terminal Descriptor */
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AUDIO_INPUT_TERMINAL_DESC_SIZE, /* bLength */
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AUDIO_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType */
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AUDIO_CONTROL_INPUT_TERMINAL, /* bDescriptorSubtype */
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0x01, /* bTerminalID */
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0x01, /* wTerminalType AUDIO_TERMINAL_USB_STREAMING 0x0101 */
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0x01,
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0x00, /* bAssocTerminal */
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0x01, /* bNrChannels */
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0x00, /* wChannelConfig 0x0000 Mono */
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0x00,
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0x00, /* iChannelNames */
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0x00, /* iTerminal */
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/* 12 byte*/
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/* USB Speaker Audio Feature Unit Descriptor */
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0x09, /* bLength */
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AUDIO_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType */
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AUDIO_CONTROL_FEATURE_UNIT, /* bDescriptorSubtype */
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AUDIO_OUT_STREAMING_CTRL, /* bUnitID */
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0x01, /* bSourceID */
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0x01, /* bControlSize */
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AUDIO_CONTROL_MUTE,// |AUDIO_CONTROL_VOLUME, /* bmaControls(0) */
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0, /* bmaControls(1) */
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0x00, /* iTerminal */
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/* 09 byte*/
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/*USB Speaker Output Terminal Descriptor */
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0x09, /* bLength */
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AUDIO_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType */
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AUDIO_CONTROL_OUTPUT_TERMINAL, /* bDescriptorSubtype */
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0x03, /* bTerminalID */
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0x01, /* wTerminalType 0x0301*/
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0x03,
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0x00, /* bAssocTerminal */
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0x02, /* bSourceID */
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0x00, /* iTerminal */
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/* 09 byte*/
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/* USB Speaker Standard AS Interface Descriptor - Audio Streaming Zero Bandwith */
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/* Interface 1, Alternate Setting 0 */
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AUDIO_INTERFACE_DESC_SIZE, /* bLength */
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USB_DESC_TYPE_INTERFACE, /* bDescriptorType */
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0x01, /* bInterfaceNumber */
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0x00, /* bAlternateSetting */
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0x00, /* bNumEndpoints */
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USB_DEVICE_CLASS_AUDIO, /* bInterfaceClass */
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AUDIO_SUBCLASS_AUDIOSTREAMING, /* bInterfaceSubClass */
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AUDIO_PROTOCOL_UNDEFINED, /* bInterfaceProtocol */
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0x00, /* iInterface */
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/* 09 byte*/
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/* USB Speaker Standard AS Interface Descriptor - Audio Streaming Operational */
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/* Interface 1, Alternate Setting 1 */
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AUDIO_INTERFACE_DESC_SIZE, /* bLength */
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USB_DESC_TYPE_INTERFACE, /* bDescriptorType */
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0x01, /* bInterfaceNumber */
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0x01, /* bAlternateSetting */
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0x01, /* bNumEndpoints */
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USB_DEVICE_CLASS_AUDIO, /* bInterfaceClass */
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AUDIO_SUBCLASS_AUDIOSTREAMING, /* bInterfaceSubClass */
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AUDIO_PROTOCOL_UNDEFINED, /* bInterfaceProtocol */
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0x00, /* iInterface */
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/* 09 byte*/
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/* USB Speaker Audio Streaming Interface Descriptor */
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AUDIO_STREAMING_INTERFACE_DESC_SIZE, /* bLength */
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AUDIO_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType */
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AUDIO_STREAMING_GENERAL, /* bDescriptorSubtype */
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0x01, /* bTerminalLink */
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0x01, /* bDelay */
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0x01, /* wFormatTag AUDIO_FORMAT_PCM 0x0001*/
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0x00,
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/* 07 byte*/
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/* USB Speaker Audio Type III Format Interface Descriptor */
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0x0B, /* bLength */
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AUDIO_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType */
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AUDIO_STREAMING_FORMAT_TYPE, /* bDescriptorSubtype */
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AUDIO_FORMAT_TYPE_III, /* bFormatType */
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0x02, /* bNrChannels */
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0x02, /* bSubFrameSize : 2 Bytes per frame (16bits) */
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16, /* bBitResolution (16-bits per sample) */
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0x01, /* bSamFreqType only one frequency supported */
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AUDIO_SAMPLE_FREQ(USBD_AUDIO_FREQ), /* Audio sampling frequency coded on 3 bytes */
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/* 11 byte*/
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/* Endpoint 1 - Standard Descriptor */
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AUDIO_STANDARD_ENDPOINT_DESC_SIZE, /* bLength */
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USB_DESC_TYPE_ENDPOINT, /* bDescriptorType */
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AUDIO_OUT_EP, /* bEndpointAddress 1 out endpoint*/
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USBD_EP_TYPE_ISOC, /* bmAttributes */
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AUDIO_PACKET_SZE(USBD_AUDIO_FREQ), /* wMaxPacketSize in Bytes (Freq(Samples)*2(Stereo)*2(HalfWord)) */
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0x01, /* bInterval */
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0x00, /* bRefresh */
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0x00, /* bSynchAddress */
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/* 09 byte*/
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/* Endpoint - Audio Streaming Descriptor*/
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AUDIO_STREAMING_ENDPOINT_DESC_SIZE, /* bLength */
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AUDIO_ENDPOINT_DESCRIPTOR_TYPE, /* bDescriptorType */
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AUDIO_ENDPOINT_GENERAL, /* bDescriptor */
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0x00, /* bmAttributes */
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0x00, /* bLockDelayUnits */
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0x00, /* wLockDelay */
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0x00,
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/* 07 byte*/
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} ;
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/* USB Standard Device Descriptor */
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__ALIGN_BEGIN static uint8_t USBD_AUDIO_DeviceQualifierDesc[USB_LEN_DEV_QUALIFIER_DESC] __ALIGN_END=
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{
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USB_LEN_DEV_QUALIFIER_DESC,
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USB_DESC_TYPE_DEVICE_QUALIFIER,
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0x00,
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0x02,
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0x00,
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0x00,
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0x00,
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0x40,
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0x01,
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0x00,
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};
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/**
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* @}
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*/
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/** @defgroup USBD_AUDIO_Private_Functions
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* @{
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*/
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/**
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* @brief USBD_AUDIO_Init
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* Initialize the AUDIO interface
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* @param pdev: device instance
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* @param cfgidx: Configuration index
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* @retval status
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*/
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static uint8_t USBD_AUDIO_Init (USBD_HandleTypeDef *pdev,
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uint8_t cfgidx)
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{
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USBD_AUDIO_HandleTypeDef *haudio;
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/* Open EP OUT */
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USBD_LL_OpenEP(pdev,
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AUDIO_OUT_EP,
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USBD_EP_TYPE_ISOC,
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AUDIO_OUT_PACKET);
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/* Allocate Audio structure */
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pdev->pClassData = USBD_malloc(sizeof (USBD_AUDIO_HandleTypeDef));
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if(pdev->pClassData == NULL)
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{
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return USBD_FAIL;
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}
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else
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{
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haudio = pdev->pClassData;
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haudio->alt_setting = 0;
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haudio->offset = AUDIO_OFFSET_UNKNOWN;
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haudio->wr_ptr = 0;
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haudio->rd_ptr = 0;
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haudio->rd_enable = 0;
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/* Initialize the Audio output Hardware layer */
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if (((USBD_AUDIO_ItfTypeDef *)pdev->pUserData)->Init(USBD_AUDIO_FREQ, AUDIO_DEFAULT_VOLUME, 0) != USBD_OK)
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{
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return USBD_FAIL;
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}
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/* Prepare Out endpoint to receive 1st packet */
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||
|
|
USBD_LL_PrepareReceive(pdev,
|
||
|
|
AUDIO_OUT_EP,
|
||
|
|
haudio->buffer,
|
||
|
|
AUDIO_OUT_PACKET);
|
||
|
|
}
|
||
|
|
return USBD_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief USBD_AUDIO_Init
|
||
|
|
* DeInitialize the AUDIO layer
|
||
|
|
* @param pdev: device instance
|
||
|
|
* @param cfgidx: Configuration index
|
||
|
|
* @retval status
|
||
|
|
*/
|
||
|
|
static uint8_t USBD_AUDIO_DeInit (USBD_HandleTypeDef *pdev,
|
||
|
|
uint8_t cfgidx)
|
||
|
|
{
|
||
|
|
|
||
|
|
/* Open EP OUT */
|
||
|
|
USBD_LL_CloseEP(pdev,
|
||
|
|
AUDIO_OUT_EP);
|
||
|
|
|
||
|
|
/* DeInit physical Interface components */
|
||
|
|
if(pdev->pClassData != NULL)
|
||
|
|
{
|
||
|
|
((USBD_AUDIO_ItfTypeDef *)pdev->pUserData)->DeInit(0);
|
||
|
|
USBD_free(pdev->pClassData);
|
||
|
|
pdev->pClassData = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
return USBD_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief USBD_AUDIO_Setup
|
||
|
|
* Handle the AUDIO specific requests
|
||
|
|
* @param pdev: instance
|
||
|
|
* @param req: usb requests
|
||
|
|
* @retval status
|
||
|
|
*/
|
||
|
|
static uint8_t USBD_AUDIO_Setup (USBD_HandleTypeDef *pdev,
|
||
|
|
USBD_SetupReqTypedef *req)
|
||
|
|
{
|
||
|
|
USBD_AUDIO_HandleTypeDef *haudio;
|
||
|
|
uint16_t len;
|
||
|
|
uint8_t *pbuf;
|
||
|
|
uint8_t ret = USBD_OK;
|
||
|
|
haudio = pdev->pClassData;
|
||
|
|
|
||
|
|
switch (req->bmRequest & USB_REQ_TYPE_MASK)
|
||
|
|
{
|
||
|
|
case USB_REQ_TYPE_CLASS :
|
||
|
|
switch (req->bRequest)
|
||
|
|
{
|
||
|
|
case AUDIO_REQ_GET_CUR:
|
||
|
|
AUDIO_REQ_GetCurrent(pdev, req);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case AUDIO_REQ_SET_CUR:
|
||
|
|
AUDIO_REQ_SetCurrent(pdev, req);
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
USBD_CtlError (pdev, req);
|
||
|
|
ret = USBD_FAIL;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
case USB_REQ_TYPE_STANDARD:
|
||
|
|
switch (req->bRequest)
|
||
|
|
{
|
||
|
|
case USB_REQ_GET_DESCRIPTOR:
|
||
|
|
if( (req->wValue >> 8) == AUDIO_DESCRIPTOR_TYPE)
|
||
|
|
{
|
||
|
|
pbuf = USBD_AUDIO_CfgDesc + 18;
|
||
|
|
len = MIN(USB_AUDIO_DESC_SIZ , req->wLength);
|
||
|
|
|
||
|
|
|
||
|
|
USBD_CtlSendData (pdev,
|
||
|
|
pbuf,
|
||
|
|
len);
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
case USB_REQ_GET_INTERFACE :
|
||
|
|
USBD_CtlSendData (pdev,
|
||
|
|
(uint8_t *)haudio->alt_setting,
|
||
|
|
1);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case USB_REQ_SET_INTERFACE :
|
||
|
|
if ((uint8_t)(req->wValue) <= USBD_MAX_NUM_INTERFACES)
|
||
|
|
{
|
||
|
|
haudio->alt_setting = (uint8_t)(req->wValue);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
/* Call the error management function (command will be nacked */
|
||
|
|
USBD_CtlError (pdev, req);
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
USBD_CtlError (pdev, req);
|
||
|
|
ret = USBD_FAIL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief USBD_AUDIO_GetCfgDesc
|
||
|
|
* return configuration descriptor
|
||
|
|
* @param speed : current device speed
|
||
|
|
* @param length : pointer data length
|
||
|
|
* @retval pointer to descriptor buffer
|
||
|
|
*/
|
||
|
|
static uint8_t *USBD_AUDIO_GetCfgDesc (uint16_t *length)
|
||
|
|
{
|
||
|
|
*length = sizeof (USBD_AUDIO_CfgDesc);
|
||
|
|
return USBD_AUDIO_CfgDesc;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief USBD_AUDIO_DataIn
|
||
|
|
* handle data IN Stage
|
||
|
|
* @param pdev: device instance
|
||
|
|
* @param epnum: endpoint index
|
||
|
|
* @retval status
|
||
|
|
*/
|
||
|
|
static uint8_t USBD_AUDIO_DataIn (USBD_HandleTypeDef *pdev,
|
||
|
|
uint8_t epnum)
|
||
|
|
{
|
||
|
|
|
||
|
|
/* Only OUT data are processed */
|
||
|
|
return USBD_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief USBD_AUDIO_EP0_RxReady
|
||
|
|
* handle EP0 Rx Ready event
|
||
|
|
* @param pdev: device instance
|
||
|
|
* @retval status
|
||
|
|
*/
|
||
|
|
static uint8_t USBD_AUDIO_EP0_RxReady (USBD_HandleTypeDef *pdev)
|
||
|
|
{
|
||
|
|
USBD_AUDIO_HandleTypeDef *haudio;
|
||
|
|
haudio = pdev->pClassData;
|
||
|
|
|
||
|
|
if (haudio->control.cmd == AUDIO_REQ_SET_CUR)
|
||
|
|
{/* In this driver, to simplify code, only SET_CUR request is managed */
|
||
|
|
|
||
|
|
if (haudio->control.unit == AUDIO_OUT_STREAMING_CTRL)
|
||
|
|
{
|
||
|
|
((USBD_AUDIO_ItfTypeDef *)pdev->pUserData)->MuteCtl(haudio->control.data[0]);
|
||
|
|
haudio->control.cmd = 0;
|
||
|
|
haudio->control.len = 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return USBD_OK;
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* @brief USBD_AUDIO_EP0_TxReady
|
||
|
|
* handle EP0 TRx Ready event
|
||
|
|
* @param pdev: device instance
|
||
|
|
* @retval status
|
||
|
|
*/
|
||
|
|
static uint8_t USBD_AUDIO_EP0_TxReady (USBD_HandleTypeDef *pdev)
|
||
|
|
{
|
||
|
|
/* Only OUT control data are processed */
|
||
|
|
return USBD_OK;
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* @brief USBD_AUDIO_SOF
|
||
|
|
* handle SOF event
|
||
|
|
* @param pdev: device instance
|
||
|
|
* @retval status
|
||
|
|
*/
|
||
|
|
static uint8_t USBD_AUDIO_SOF (USBD_HandleTypeDef *pdev)
|
||
|
|
{
|
||
|
|
return USBD_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief USBD_AUDIO_SOF
|
||
|
|
* handle SOF event
|
||
|
|
* @param pdev: device instance
|
||
|
|
* @retval status
|
||
|
|
*/
|
||
|
|
void USBD_AUDIO_Sync (USBD_HandleTypeDef *pdev, AUDIO_OffsetTypeDef offset)
|
||
|
|
{
|
||
|
|
int8_t shift = 0;
|
||
|
|
USBD_AUDIO_HandleTypeDef *haudio;
|
||
|
|
haudio = pdev->pClassData;
|
||
|
|
|
||
|
|
haudio->offset = offset;
|
||
|
|
|
||
|
|
|
||
|
|
if(haudio->rd_enable == 1)
|
||
|
|
{
|
||
|
|
haudio->rd_ptr += AUDIO_TOTAL_BUF_SIZE/2;
|
||
|
|
|
||
|
|
if (haudio->rd_ptr == AUDIO_TOTAL_BUF_SIZE)
|
||
|
|
{
|
||
|
|
/* roll back */
|
||
|
|
haudio->rd_ptr = 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if(haudio->rd_ptr > haudio->wr_ptr)
|
||
|
|
{
|
||
|
|
if((haudio->rd_ptr - haudio->wr_ptr) < AUDIO_OUT_PACKET)
|
||
|
|
{
|
||
|
|
shift = -4;
|
||
|
|
}
|
||
|
|
else if((haudio->rd_ptr - haudio->wr_ptr) > (AUDIO_TOTAL_BUF_SIZE - AUDIO_OUT_PACKET))
|
||
|
|
{
|
||
|
|
shift = 4;
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
if((haudio->wr_ptr - haudio->rd_ptr) < AUDIO_OUT_PACKET)
|
||
|
|
{
|
||
|
|
shift = 4;
|
||
|
|
}
|
||
|
|
else if((haudio->wr_ptr - haudio->rd_ptr) > (AUDIO_TOTAL_BUF_SIZE - AUDIO_OUT_PACKET))
|
||
|
|
{
|
||
|
|
shift = -4;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if(haudio->offset == AUDIO_OFFSET_FULL)
|
||
|
|
{
|
||
|
|
((USBD_AUDIO_ItfTypeDef *)pdev->pUserData)->AudioCmd(&haudio->buffer[0],
|
||
|
|
AUDIO_TOTAL_BUF_SIZE/2 - shift,
|
||
|
|
AUDIO_CMD_PLAY);
|
||
|
|
haudio->offset = AUDIO_OFFSET_NONE;
|
||
|
|
}
|
||
|
|
else if (haudio->offset == AUDIO_OFFSET_HALF)
|
||
|
|
{
|
||
|
|
|
||
|
|
((USBD_AUDIO_ItfTypeDef *)pdev->pUserData)->AudioCmd(&haudio->buffer[AUDIO_TOTAL_BUF_SIZE/2],
|
||
|
|
AUDIO_TOTAL_BUF_SIZE/2 - shift,
|
||
|
|
AUDIO_CMD_PLAY);
|
||
|
|
haudio->offset = AUDIO_OFFSET_NONE;
|
||
|
|
|
||
|
|
}
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* @brief USBD_AUDIO_IsoINIncomplete
|
||
|
|
* handle data ISO IN Incomplete event
|
||
|
|
* @param pdev: device instance
|
||
|
|
* @param epnum: endpoint index
|
||
|
|
* @retval status
|
||
|
|
*/
|
||
|
|
static uint8_t USBD_AUDIO_IsoINIncomplete (USBD_HandleTypeDef *pdev, uint8_t epnum)
|
||
|
|
{
|
||
|
|
|
||
|
|
return USBD_OK;
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* @brief USBD_AUDIO_IsoOutIncomplete
|
||
|
|
* handle data ISO OUT Incomplete event
|
||
|
|
* @param pdev: device instance
|
||
|
|
* @param epnum: endpoint index
|
||
|
|
* @retval status
|
||
|
|
*/
|
||
|
|
static uint8_t USBD_AUDIO_IsoOutIncomplete (USBD_HandleTypeDef *pdev, uint8_t epnum)
|
||
|
|
{
|
||
|
|
|
||
|
|
return USBD_OK;
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* @brief USBD_AUDIO_DataOut
|
||
|
|
* handle data OUT Stage
|
||
|
|
* @param pdev: device instance
|
||
|
|
* @param epnum: endpoint index
|
||
|
|
* @retval status
|
||
|
|
*/
|
||
|
|
static uint8_t USBD_AUDIO_DataOut (USBD_HandleTypeDef *pdev,
|
||
|
|
uint8_t epnum)
|
||
|
|
{
|
||
|
|
USBD_AUDIO_HandleTypeDef *haudio;
|
||
|
|
haudio = pdev->pClassData;
|
||
|
|
|
||
|
|
if (epnum == AUDIO_OUT_EP)
|
||
|
|
{
|
||
|
|
/* Increment the Buffer pointer or roll it back when all buffers are full */
|
||
|
|
|
||
|
|
haudio->wr_ptr += AUDIO_OUT_PACKET;
|
||
|
|
|
||
|
|
if (haudio->wr_ptr == AUDIO_TOTAL_BUF_SIZE)
|
||
|
|
{/* All buffers are full: roll back */
|
||
|
|
haudio->wr_ptr = 0;
|
||
|
|
|
||
|
|
if(haudio->offset == AUDIO_OFFSET_UNKNOWN)
|
||
|
|
{
|
||
|
|
((USBD_AUDIO_ItfTypeDef *)pdev->pUserData)->AudioCmd(&haudio->buffer[0],
|
||
|
|
AUDIO_TOTAL_BUF_SIZE/2,
|
||
|
|
AUDIO_CMD_START);
|
||
|
|
haudio->offset = AUDIO_OFFSET_NONE;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if(haudio->rd_enable == 0)
|
||
|
|
{
|
||
|
|
if (haudio->wr_ptr == (AUDIO_TOTAL_BUF_SIZE / 2))
|
||
|
|
{
|
||
|
|
haudio->rd_enable = 1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Prepare Out endpoint to receive next audio packet */
|
||
|
|
USBD_LL_PrepareReceive(pdev,
|
||
|
|
AUDIO_OUT_EP,
|
||
|
|
&haudio->buffer[haudio->wr_ptr],
|
||
|
|
AUDIO_OUT_PACKET);
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
return USBD_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief AUDIO_Req_GetCurrent
|
||
|
|
* Handles the GET_CUR Audio control request.
|
||
|
|
* @param pdev: instance
|
||
|
|
* @param req: setup class request
|
||
|
|
* @retval status
|
||
|
|
*/
|
||
|
|
static void AUDIO_REQ_GetCurrent(USBD_HandleTypeDef *pdev, USBD_SetupReqTypedef *req)
|
||
|
|
{
|
||
|
|
USBD_AUDIO_HandleTypeDef *haudio;
|
||
|
|
haudio = pdev->pClassData;
|
||
|
|
|
||
|
|
memset(haudio->control.data, 0, 64);
|
||
|
|
/* Send the current mute state */
|
||
|
|
USBD_CtlSendData (pdev,
|
||
|
|
haudio->control.data,
|
||
|
|
req->wLength);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief AUDIO_Req_SetCurrent
|
||
|
|
* Handles the SET_CUR Audio control request.
|
||
|
|
* @param pdev: instance
|
||
|
|
* @param req: setup class request
|
||
|
|
* @retval status
|
||
|
|
*/
|
||
|
|
static void AUDIO_REQ_SetCurrent(USBD_HandleTypeDef *pdev, USBD_SetupReqTypedef *req)
|
||
|
|
{
|
||
|
|
USBD_AUDIO_HandleTypeDef *haudio;
|
||
|
|
haudio = pdev->pClassData;
|
||
|
|
|
||
|
|
if (req->wLength)
|
||
|
|
{
|
||
|
|
/* Prepare the reception of the buffer over EP0 */
|
||
|
|
USBD_CtlPrepareRx (pdev,
|
||
|
|
haudio->control.data,
|
||
|
|
req->wLength);
|
||
|
|
|
||
|
|
haudio->control.cmd = AUDIO_REQ_SET_CUR; /* Set the request value */
|
||
|
|
haudio->control.len = req->wLength; /* Set the request data length */
|
||
|
|
haudio->control.unit = HIBYTE(req->wIndex); /* Set the request target unit */
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief DeviceQualifierDescriptor
|
||
|
|
* return Device Qualifier descriptor
|
||
|
|
* @param length : pointer data length
|
||
|
|
* @retval pointer to descriptor buffer
|
||
|
|
*/
|
||
|
|
static uint8_t *USBD_AUDIO_GetDeviceQualifierDesc (uint16_t *length)
|
||
|
|
{
|
||
|
|
*length = sizeof (USBD_AUDIO_DeviceQualifierDesc);
|
||
|
|
return USBD_AUDIO_DeviceQualifierDesc;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief USBD_AUDIO_RegisterInterface
|
||
|
|
* @param fops: Audio interface callback
|
||
|
|
* @retval status
|
||
|
|
*/
|
||
|
|
uint8_t USBD_AUDIO_RegisterInterface (USBD_HandleTypeDef *pdev,
|
||
|
|
USBD_AUDIO_ItfTypeDef *fops)
|
||
|
|
{
|
||
|
|
if(fops != NULL)
|
||
|
|
{
|
||
|
|
pdev->pUserData= fops;
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* @}
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @}
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @}
|
||
|
|
*/
|
||
|
|
|
||
|
|
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
|